I've probably had my best time acting - or not acting, or trying to not act - on things like 'The Low Down' or 'Treacle Jr.' I'm happiest doing things like that. Not just because they're lead roles, but because there's more freedom in them.

It's always more interesting to take on someone that's going to have hidden sides or a fatal flaw, because there's going to be more to play with - more conflict, internally or in and around them - but it's probably the thing of finding the positive in there.

Both 'The Wire' and 'Queer as Folk' had a big scope. They were panoramas, telling ambitious stories about two cities, Baltimore and Manchester, for the first time.

It seems to me that most characters, in anything, are flawed in some way, just like most people. You look for the good in the flawed people and vice versa, and then try and make them appealing in some way.

I've made a point of trying not to play the same part, and of moving between theatre and film and TV. The idea is that by the time you come back, you have been away for a year and people have forgotten you. If you like having time off, which I do, that's a good career strategy.

A good trick I learnt early on is not to immediately look at playback because once you know the shot, you can see when the camera is on you. It's best to stay 'in it' all the time, and just if it's on you, it's on you, and if it's not, it's not. It's the easiest way.